[Openstack-stable-maint] Stable check of openstack/oslo.middleware for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/37f7e8c0320e486f85eb99623bd982... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f733402de1b44bfba7290bacf691e08e : SUCCESS in 3m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/dcd27be14b2541f2814073b1b0eea002 : FAILURE in 2m 52s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d60874ff21a64353ac5741de9b1477f4 : SUCCESS in 2m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6ead17880b7c4aac8b93a2f48b1fcdf4 : FAILURE in 3m 01s